/* 练习卡片样式 */
.practice-card {
    border: 1px solid #E5E6EB;
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 24px;
    transition: all 0.3s ease;
    background-color: #FFFFFF;
}

.practice-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.practice-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #1D2129;
}

.practice-card p {
    margin-bottom: 8px;
    color: #4E5969;
}

.practice-card .meta-info {
    color: #86909C;
    font-size: 14px;
}

/* 批改按钮样式 */
.grade-button {
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    background-color: #165DFF;
    color: white;
    border: none;
    margin-top: 12px;
}

.grade-button:hover {
    background-color: #124ECC;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(22, 93, 255, 0.2);
}

.grade-button i {
    margin-right: 6px;
}

/* 状态标签 */
.status-label {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-judged {
    background-color: #ECFDF5;
    color: #059669;
}

.status-unjudged {
    background-color: #FEF2F2;
    color: #DC2626;
}

/* 错误提示 */
.error-message {
    background-color: #FEF2F2;
    border: 1px solid #FECACA;
    color: #DC2626;
    padding: 16px;
    border-radius: 8px;
    text-align: center;
}

.error-message h3 {
    font-weight: 600;
    margin-bottom: 8px;
}

/* 空状态提示 */
.empty-state {
    text-align: center;
    padding: 40px 0;
    color: #9CA3AF;
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    color: #D1D5DB;
}

/* 响应式调整 */
@media (max-width: 640px) {
    .practice-card {
        padding: 16px;
    }
    
    .grade-button {
        width: 100%;
    }
}